Safety closing device for miner&#39;s lamps.



No. 843,505. PATENTED FEB. 5, 1907/ A. L. TOMBELAINE; SAFETY GLOSINGDEVICE FOR MINERSY LAMPS APPLICATION FILED OUT. 9, 1905.

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I PATENTED FEB. 5, 1907.

A. L. TOMBELAINE. SAFETY CLOSING DEVICE FOR MINERS LAMPS.

APILIOATION FILED 00129, 1905.

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ALEXANDRE SA F E Specification of Letters Patent.

T! CLGSENG DEJECE F82 hillNEPlS LAEVEP Ea ented Feb. 5, 1907.

Application filed October 9,1905. $crial lie. 282,079.

T0 1072/0771, it may concern.-

Be it known that l, nLnXANnnE LEONARD TOMBELAINE, engineer, citizen ofthe French Republic, residing at Chateau de la Guronniere-Chaptelat,l-laute-Vienne, France, have invented certain new and usefulimprovements in Safety Closing Devices for Miners Lamps, of whicn thefollowing is a specification.

This invention has for its object a safety closing de ice for minerslamps.

In this arrangement the closing and. opening of the lamp can only beeffected by means of a jet of compressed air.

The weight of this lamp is far less than that of magnetically-closedlamps, and its construction is simple and inexpensive.

In the accompanying drawings, Figure 1 is a section of a lamp providedwith the device forming the object of the i vention. Fi. s 2 and 3 showa detail of the device, at a larg -r scale, in two positions. Fig. i isa section through line A A of Fig. 2. Fig. 5 is pan tial view of theupper part of the reservoir of the lamp. Fig. 6' is a view sim ar toFig. 1, showing a modification. 7 is a perspective view showing themanner of opening the lamp.

In a lamp having this locking device the receptacle 1, which constitutesthe reservoir of the lamp, is screwed within the body 2, whichcompletely closes it, and owing to which a miner who without authorityendeavors to open his lamp has hardly any hold upon the receptacle forthe purpose of unscrewing it.

At its upper part the receptacle is provided with an annular groove 3,in which formed a number of notches a. li ithin the upper body of thelamp is angcd a small cylinder 5, extending at right angles with respectto the body of the lamp, an d in which a piston 6 is capable ofdisplacement. This piston carries on its under side a dependingprojection 7, passing through a recess 8,

A spring 9 conformed in the cylinder-wall. V stantly tends to separatethe piston from the wall and to return it to its outward position, asshown on Fig. 2. When the piston is in the inward position, in w richthe spring is compressed, as shown in Fig. 3, the receptacle of the lampmay be screwed home,

which would otherwise be impossible. E'Vhen once the receptacle has beenscrewed home, the spring 9 1s permitted to extend. The preton tends toassume the outward position and bears against the flange 10, formed bythe groove in the base. the receptacle is now unscrewed, the projection7 on the piston coming opposite a rcess l in the annular groove 3, "thespring 9, fully extending, will enthe said projection 7 in this notch 1and will lock it, making it impossible for unauthorized persons tounscrew the lamp. In order to control the movements of the piston, thecylinder communicates its rear part, by means of a small passage 11,with a chamber 12, communicating with the exterior through holes 13.

in order to compress the spring 9, the holes 13 are arranged in front ofa conduit conducting compressed air. The compressed air enters thechamber 12 and the conduit 11 at the rear of the cylinder 5 and forcesthe piston 6 into the position in which the spring is comp essed, Fig.3. It is then possible to screw home the receptacle of the lamp. As soonas this operation is finished the lamp is removed, and the piston, freefrom the airpressure, tends to assume the outward position, in which thespring is extended, Fig. 2, thus in hing it impossible to unscrew thebase without again bringing the holes 13, communicating with theexterior, in front of the jet of compressed air.

A sufficient number of the notches 4 may be made to permit of effectingthe screwing home readily, so that after the jet of compressed air iscut oil at the lamp department it is only necessary to screw up a littlemore in order that the projection 7 on the piston may fall into one ofthe notches 1. In oint of fact it is alw ys preferable that the lockingshould be effected in tightening rather than in loosening.

The piston carries at its rear 9. small projection 1a, which, whateverthe position of the piston, prevents the compressed air entering thecylinder 5, escaping by way of the recess 8 in the wall of saidcylinder.

Instead of adopting the pattern described above there might besubstituted for the air-chamber 12 a tube 15, connecting With theconduit 11.

in the bottom of the lampreceptacle 1 is formed a recess 16, ofelliptical form, in wl ich a special key is engaged for screwing orunscrewing, as is shown in Fig. 7.

Having thus t'lescribed and ascertained the nature of my invention andinwhat manner the same may be performed, I declare that What I claim, is

1. A safety closing device for miners tacle constituting a reservoiradapted to be 20 lamps comprising the combination with the body of thelamp and a receptacle constituting a reservoir extending in the lampbody and provided With notches at the upper part thereof, of a casingsecured to and extending at right angles With respect to the body of Ithe lamp, a fluid-operated piston arranged Within the cylinderand havinga depending projection adapted to engage in the notches of thereceptacle, a spring acting on the piston for causing the projectionthereof to engage in said notches, and means for separating the saidprojection from the notches of the base.

2. A safety closing device for miners lamps comprising the combinationwith the lamp-body having the chamber communicating With a motive-fluidsupply, and a recepdetachably secured in said body and pro vided withnotches, of a cylinder arranged *itlnn the body of the lamp, extendingat right angles *ith respect thereto and coinmunicating With the chamberof the lampbody, a piston arranged Within said cylinder and having adepending projection adapted to engage in the notches of the receptacle,a spring acting on the piston for causing the projection thereof toengage in the notches of the receptacle.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

ALEXANDRE LEONARD TOMBELAIXE. Witnesses L. MOUNIER, (LoUIs JEAN) E.Monenv, (EMILE)

